cited by: polyacrylamide/phpa/polyacrylamide/phpa direct at chile

cited by: polyacrylamide/phpa/polyacrylamide/phpa direct at chile
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  • What is partially hydrolyzed polyacrylamide (PHPA)?
  • Partially hydrolyzed polyacrylamide (PHPA) is the most frequently used polymer in this respect, owing to its low cost, viscosifying nature, and well-known physiochemical properties (Urbissinova et al. 2010 ). The molecule of this polymer is a flexible chain which remains in coil-like structure in the absence of a shearing effect.
  • How does PHPA affect fluid rheology?
  • The introduction of higher molecular weight synthetic polymers typified by partially hydrolysed polyacrylamide (PHPA) allowed the same effect on fluid rheology to be achieved at much lower additive concentrations, a major practical advantage.
  • What is a PHPA molecule?
  • The molecule of this polymer is a flexible chain which remains in coil-like structure in the absence of a shearing effect. The application of PHPA is limited due to high temperature and salinity (Uddin et al. 2002 ).
  • Does encapsulation of cutting particles based on PHPA polymers prevent flocculation?
  • Conclusions The effective encapsulation of cutting particles suspended in drilling fluids based on PHPA polymers severely limits (if not prevents) subsequent flocculation by dosing similar anionic flocculants.